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Warning: fwrite(): supplied argument is not a valid stream resource in /home/virtual/pediatrics/journal/ip_info/view_data.php on line 83 冷血動物에 있어서의 日本腦炎 바이러스에 對한 硏究(II) (개구리體內에서 日本腦炎바이러스가 潛伏하고 있는 期間과 그疫學的意義)